Is a fuel consumption of 5.5L/100km considered fuel-efficient?

[DeEmersyn]

Different vehicle models inherently have varying fuel consumption levels, so whether 5.5L/100km is fuel-efficient cannot be generalized—it depends on the specific vehicle type. Automotive fuel consumption calculation method: Fuel consumption per 100km = Volume of fuel consumed (liters) ÷ Distance traveled on that fuel (kilometers) × 100. For example, if a vehicle consumes A liters of fuel while traveling N kilometers, then its fuel consumption per 100km = A ÷ N × 100. Factors contributing to increased fuel consumption include: 1. Low tire pressure or severe tread wear: Increased contact area between tires and road surface raises friction and rolling resistance, naturally increasing fuel consumption. While overinflated tires may slightly improve fuel efficiency, they compromise ride comfort and increase blowout risks. 2. Driving habits: Smooth acceleration with linear throttle input promotes fuel efficiency, whereas aggressive driving behaviors like sudden acceleration, frequent braking, repeated engine starts, and unnecessary revving waste fuel. Since mechanical systems cannot respond instantly, such practices increase fuel usage. 3. Fuel quality: Higher-quality gasoline enables more complete combustion, reducing consumption. Conversely, gasoline with impurities increases fuel waste. 4. Substandard engine oil: Poor-quality or overfilled engine oil may enter combustion chambers, hindering complete fuel combustion and increasing consumption. Insufficient lubrication also forces the engine to work harder, requiring more fuel for equivalent performance.